On the TVP User Forum there were these details posted about the production:

In "Le Royaume", they partly animated on paper and scanned the drawings to TVP for coloring , but because of the lack of time (scanning, scan-clean, etc ... there is no high-speed batch scanner available for students at the Gobelins school.), they ended up animating the rest of the film directly into TVP Animation (with Wacom tablets) and were able to finish the project on time.